Here is a link to some information that may be useful for the era. Its quite in depth. The website itself has more information about other historical eras in almost every part of the world than ive found anywhere else. the link should take you half way down a page to the era in question, 25-220ad, it is quite short but afterwards delves into the three kingdoms, 220-266ad. this is just 1 page of hundreds and if you check out the side scroll bar then you will get an idea of the information on the site. I thought id post it as it could prove useful.